diff options
Diffstat (limited to 'drivers/gpu/drm/i915/intel_uc_fw.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_uc_fw.c | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_uc_fw.c b/drivers/gpu/drm/i915/intel_uc_fw.c new file mode 100644 index 000000000000..766b1cbdfbd7 --- /dev/null +++ b/drivers/gpu/drm/i915/intel_uc_fw.c @@ -0,0 +1,193 @@ +/* + * Copyright © 2016-2017 Intel Corporation + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + * + */ + +#include <linux/firmware.h> + +#include "intel_uc_fw.h" +#include "i915_drv.h" + +/** + * intel_uc_fw_fetch - fetch uC firmware + * + * @dev_priv: device private + * @uc_fw: uC firmware + * + * Fetch uC firmware into GEM obj. + */ +void intel_uc_fw_fetch(struct drm_i915_private *dev_priv, + struct intel_uc_fw *uc_fw) +{ + struct pci_dev *pdev = dev_priv->drm.pdev; + struct drm_i915_gem_object *obj; + const struct firmware *fw = NULL; + struct uc_css_header *css; + size_t size; + int err; + + if (!uc_fw->path) + return; + + uc_fw->fetch_status = INTEL_UC_FIRMWARE_PENDING; + + DRM_DEBUG_DRIVER("before requesting firmware: uC fw fetch status %s\n", + intel_uc_fw_status_repr(uc_fw->fetch_status)); + + err = request_firmware(&fw, uc_fw->path, &pdev->dev); + if (err) + goto fail; + if (!fw) + goto fail; + + DRM_DEBUG_DRIVER("fetch uC fw from %s succeeded, fw %p\n", + uc_fw->path, fw); + + /* Check the size of the blob before examining buffer contents */ + if (fw->size < sizeof(struct uc_css_header)) { + DRM_NOTE("Firmware header is missing\n"); + goto fail; + } + + css = (struct uc_css_header *)fw->data; + + /* Firmware bits always start from header */ + uc_fw->header_offset = 0; + uc_fw->header_size = (css->header_size_dw - css->modulus_size_dw - + css->key_size_dw - css->exponent_size_dw) * + sizeof(u32); + + if (uc_fw->header_size != sizeof(struct uc_css_header)) { + DRM_NOTE("CSS header definition mismatch\n"); + goto fail; + } + + /* then, uCode */ + uc_fw->ucode_offset = uc_fw->header_offset + uc_fw->header_size; + uc_fw->ucode_size = (css->size_dw - css->header_size_dw) * sizeof(u32); + + /* now RSA */ + if (css->key_size_dw != UOS_RSA_SCRATCH_MAX_COUNT) { + DRM_NOTE("RSA key size is bad\n"); + goto fail; + } + uc_fw->rsa_offset = uc_fw->ucode_offset + uc_fw->ucode_size; + uc_fw->rsa_size = css->key_size_dw * sizeof(u32); + + /* At least, it should have header, uCode and RSA. Size of all three. */ + size = uc_fw->header_size + uc_fw->ucode_size + uc_fw->rsa_size; + if (fw->size < size) { + DRM_NOTE("Missing firmware components\n"); + goto fail; + } + + /* + * The GuC firmware image has the version number embedded at a + * well-known offset within the firmware blob; note that major / minor + * version are TWO bytes each (i.e. u16), although all pointers and + * offsets are defined in terms of bytes (u8). + */ + switch (uc_fw->type) { + case INTEL_UC_FW_TYPE_GUC: + /* Header and uCode will be loaded to WOPCM. Size of the two. */ + size = uc_fw->header_size + uc_fw->ucode_size; + + /* Top 32k of WOPCM is reserved (8K stack + 24k RC6 context). */ + if (size > intel_guc_wopcm_size(dev_priv)) { + DRM_ERROR("Firmware is too large to fit in WOPCM\n"); + goto fail; + } + uc_fw->major_ver_found = css->guc.sw_version >> 16; + uc_fw->minor_ver_found = css->guc.sw_version & 0xFFFF; + break; + + case INTEL_UC_FW_TYPE_HUC: + uc_fw->major_ver_found = css->huc.sw_version >> 16; + uc_fw->minor_ver_found = css->huc.sw_version & 0xFFFF; + break; + + default: + DRM_ERROR("Unknown firmware type %d\n", uc_fw->type); + err = -ENOEXEC; + goto fail; + } + + if (uc_fw->major_ver_wanted == 0 && uc_fw->minor_ver_wanted == 0) { + DRM_NOTE("Skipping %s firmware version check\n", + intel_uc_fw_type_repr(uc_fw->type)); + } else if (uc_fw->major_ver_found != uc_fw->major_ver_wanted || + uc_fw->minor_ver_found < uc_fw->minor_ver_wanted) { + DRM_NOTE("%s firmware version %d.%d, required %d.%d\n", + intel_uc_fw_type_repr(uc_fw->type), + uc_fw->major_ver_found, uc_fw->minor_ver_found, + uc_fw->major_ver_wanted, uc_fw->minor_ver_wanted); + err = -ENOEXEC; + goto fail; + } + + DRM_DEBUG_DRIVER("firmware version %d.%d OK (minimum %d.%d)\n", + uc_fw->major_ver_found, uc_fw->minor_ver_found, + uc_fw->major_ver_wanted, uc_fw->minor_ver_wanted); + + obj = i915_gem_object_create_from_data(dev_priv, fw->data, fw->size); + if (IS_ERR(obj)) { + err = PTR_ERR(obj); + goto fail; + } + + uc_fw->obj = obj; + uc_fw->size = fw->size; + + DRM_DEBUG_DRIVER("uC fw fetch status SUCCESS, obj %p\n", + uc_fw->obj); + + release_firmware(fw); + uc_fw->fetch_status = INTEL_UC_FIRMWARE_SUCCESS; + return; + +fail: + DRM_WARN("Failed to fetch valid uC firmware from %s (error %d)\n", + uc_fw->path, err); + DRM_DEBUG_DRIVER("uC fw fetch status FAIL; err %d, fw %p, obj %p\n", + err, fw, uc_fw->obj); + + release_firmware(fw); /* OK even if fw is NULL */ + uc_fw->fetch_status = INTEL_UC_FIRMWARE_FAIL; +} + +/** + * intel_uc_fw_fini - cleanup uC firmware + * + * @uc_fw: uC firmware + * + * Cleans up uC firmware by releasing the firmware GEM obj. + */ +void intel_uc_fw_fini(struct intel_uc_fw *uc_fw) +{ + struct drm_i915_gem_object *obj; + + obj = fetch_and_zero(&uc_fw->obj); + if (obj) + i915_gem_object_put(obj); + + uc_fw->fetch_status = INTEL_UC_FIRMWARE_NONE; +} |